Cellulose acetate membrane synthesis from biomass of ramie

Fan, Xiushan; Liu, Zhao‐Tie; Lü, Jian

doi:10.1002/app.31202

Cited by 12 publications

(4 citation statements)

References 112 publications

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“…However, the CA of TBC‐modified biocomposites did not significantly change up to 20 wt% TBC (76°) and showed only a 10% (69°) decrease at 30 wt% TBC. This may be explained by the relatively low water solubility of TBC compared with that of PEG . Notably, TBC can form hydrogen bonds with the carbonyl groups of PLA (or WF), resulting in a layer of TBC coating on the surface of PLA and WF and leading to higher CA than that of PEG‐modified biocomposites.…”

Section: Resultsmentioning

confidence: 99%

Comparison between polyethylene glycol and tributyl citrate to modify the properties of wood fiber/polylactic acid biocomposites

Yang

et al. 2018

Polymer Composites

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In this work, polyethylene glycol (PEG) and tributyl citrate (TBC) are proposed to modify the properties of wood fiber (WF, 20 wt%)‐reinforced polylactide (PLA, 80 wt%) biocomposites. The reinforcing and toughening effects of these additives were systematically investigated by comparing their mechanical, thermal and rheological properties. It was found that 5 wt% TBC improved the compatibility between WF and PLA and resulted in increased tensile strength (15%) and thermal stability (4%) of the biocomposites compared with those of unmodified biocomposites. The glass transition temperature, melting temperature, and crystallinity of TBC‐modified biocomposites were lower than those of PEG biocomposites. In addition, the storage modulus, loss modulus and complex viscosity of TBC‐modified biocomposites were effectively improved at low TBC content (5–10 wt%), whereas reduced properties were obtained when the same PEG content was added. As wettability is always a problem in biocomposites, the contact angle was not changed with TBC content (up to 20 wt%), and a linear decrease was observed with a PEG content up to 30 wt%. POLYM. COMPOS., 40:1384–1394, 2019. © 2018 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Comparison between polyethylene glycol and tributyl citrate to modify the properties of wood fiber/polylactic acid biocomposites

Yang

et al. 2018

Polymer Composites

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“…The FTIR spectra of the materials, which can be seen in Figure 3, demonstrate that the transesterification process was carried out effectively. The OH group bands in the range of 3300-3500 cm -1 were shown in cellulose to be largely disappeared, and the acetyl group band, which is not present in native cellulose, was observed in the range of 1760 to 1725 cm -1 (Yang et al, 2008;Fan et al, 2009;Shaikh et al, 2009;Fan et al, 2010;Meireles et al, 2010;Loo et al, 2012;Popescu et al, 2012). The presence of two characteristic peaks is another evidence that the transesterification of cellulose was achieved.…”

Section: Ftirmentioning

confidence: 92%

Selülozun TBAF/DMSO Çözücü Sisteminde KH2PO4 ve Na2HPO4 Tuz Karışımı Yerine Transesterifikasyonunda Katalizör Olarak Potasyum Karbonat

ERİŞİR,

GÜMÜŞKAYA

2023

Kastamonu Üniversitesi Orman Fakültesi Dergisi

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Aim of study: This study's goal is to evaluate potassium carbonate as a catalyst for the transesterification of cellulose dissolved in TBAF/DMSO and to identify the optimal reaction conditions. Material and methods: First, a solvent system consisting of 33 g TBAF and 165 g DMSO was prepared for 10 g dissolving pulp in this solvent system for one hour, then the cellulose solution was generated. The catalysts were added to the solution. At reaction temperature, vinyl acetate was added to the solution and the 70-h transesterification process was started. The product was precipitated in ethyl alcohol and washed with water on a sieve, and then dried at room temperature. The effects of changes in catalyst ratio and temperature on bond acetyl groups were investigated by heterogeneous saponification method, FTIR, XRD, DSC, viscosity and solubility test. Main results: The samples' DS values ranged from 1.39 to 2.37 and using phosphate salt mixture catalyst and increasing the ratio of catalyst increased the DS. FTIR and XRD data revealed that acetylation was effective. DSC thermograms showed a minor endotherm at 283.3-291.2°C, and it was identified as the melting point. With potassium carbonate, the viscosity and the solubility of the products increased. Highlights: Cellulose in TBAF/DMSO could be acetylated using potassium carbonate as the catalyst. Potassium carbonate's catalyst activity was weak on DS.

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“…Indeed, due to the presence of hydroxyl groups in the structure ( Figure 2 ), CA membranes have a desirable hydrophilic property [ 47 , 48 , 49 , 50 ] and thus a potential affinity for water permeation [ 51 ]. Furthermore, they are biodegradable, biocompatible, easily manufactured, cheap, and can be easily derivatized [ 47 , 52 , 53 , 54 ]. However, cellulose acetate membranes undergo hydrolytic decomposition resulting in the substitution of hydroxyl groups by acetyl groups and a decline in the membrane performance [ 55 ].…”

Section: Introductionmentioning

confidence: 99%

The Application of Cellulose Acetate Membranes for Separation of Fermentation Broths by the Reverse Osmosis: A Feasibility Study

Tomczak

Gryta

2022

IJMS

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Recently, there has been a special research focus on the bioconversion of glycerol to 1,3-propanediol (1,3-PD) due to its significance in the chemical industry. However, the treatment and separation of fermentation broths is a great challenge. Currently, the reverse osmosis (RO) process is a reliable state-of-the-art technique for separation of biological solutions. This study (as the first to do so) investigated the feasibility of separation of 1,3-PD broths with the use of cellulose acetate (CA) membrane by the RO process. The experiments were carried out using the installation equipped with the plate module, under the transmembrane pressure (TMP) and temperature of 1 MPa and 298 K, respectively. It was found that the used membrane was suitable for broth separation. Indeed, it was noted that 1,3-PD, as a target product, migrated through the membrane; meanwhile, other broth components were rejected in various degrees. Moreover, it was proven that retention of carboxylic acids tended to increase with increasing molecular weight, according to the following order: succinic acid > lactic acid > acetic acid > formic acid. With regards to ions, retention degree increased with the increase of ionic radius and decrease of diffusion coefficient. Finally, it was demonstrated that the CA membrane is resistant to irreversible fouling, which has a positive effect on the economic viability of the process.

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Cellulose acetate membrane synthesis from biomass of ramie

Cited by 12 publications

References 112 publications

Comparison between polyethylene glycol and tributyl citrate to modify the properties of wood fiber/polylactic acid biocomposites

Comparison between polyethylene glycol and tributyl citrate to modify the properties of wood fiber/polylactic acid biocomposites

Selülozun TBAF/DMSO Çözücü Sisteminde KH2PO4 ve Na2HPO4 Tuz Karışımı Yerine Transesterifikasyonunda Katalizör Olarak Potasyum Karbonat

The Application of Cellulose Acetate Membranes for Separation of Fermentation Broths by the Reverse Osmosis: A Feasibility Study

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